Is the a reason for the steps rather than a shallow taper?
Ps. Today I supersized my i3 to print 300x300mm, I need to print a new core mould for a centrifuge. The pattern for the fuge bowl I made from 21 pieces of sapele on my router and a lathe.
I'm really getting the hang of the router, it's amazing how handy it is, almost as versatile as the printer.